Daikin FTKS50BVMB, Service Manual

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SiEN18-622 Troubleshooting for Outdoor Unit
Troubleshooting 381
7.20 Inverter Current Abnormal
Remote Control
Display
L8
Applicable
Models AII outdoor unit models
Method of
Malfunction
Detection Malfunction is detected by current flowing in the power transistor.
Malfunction
Decision
Conditions When overload in the compressor is detected.
Supposed
Causes „ Compressor overload
„ Compressor coil disconnected
„
Defect of outdoor unit PCB (A1P)
Troubleshooting
(V 3 1 8 4)
Caution
NO
YE S
NO
NO
NO
YE S
YE S
YE S
Be su re to t u rn off power s witch b efore connect or di s connect connector,
or p a rt s d a m a ge m a y b e occ u rred.
O u tp u t c u rrent check
The
s econd a ry
c u rrent of the inverter
i s higher th a n 24.9A,
260 s ec. for e a ch
ph as e.
Compre ss or
in s pection The
compre ss or' s coil i s
di s connected.
Di s connect the connection
b etween the compre ss or a nd
inverter. M a ke the power
tr a n s i s tor check mode s etting
ON b y s ervice mode.
Inverter
o u tp u t volt a ge
check Inverter o u tp u t
volt a ge i s not ba l a nced
(Norm a l if within
±
5V).
M us t b e me asu red
when fre qu ency i s
s t ab le.
After t u rning on
a g a in, "L 8 " b link s
a g a in.
Compre ss or overlo a d
In s pection of the compre ss or a nd
refriger a nt s y s tem i s re qu ired.
Repl a ce the compre ss or.
Repl a ce o u tdoor u nit PC b o a rd
(A1P).
Re s et a nd re s t a rt.
Compre ss or in s pection
In s pect a ccording to the di a gno s i s
proced u re for odd noi s e s , vi b r a tion
a nd oper a ting s t a t us of the
compre ss or.